Cumming, Linnæus, b. 1843. [from old catalog] · New York, D. Van Nostrand · leaf 318
Fig. 194. it has evaporated. They are the most constant of all cells,and therefore best suited for circuits where almost continuouswork has to be done. On other circuits some variety of thesimple zinc-copper cell is still used, and Leclanch6s aregradually coming into use. In what was called the…
Electricity
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